Improvement in stkap-bolts



grt-itch tartes atent` @fitta WILLIAM J. LEWIS AND HENRY W.OLIVER, JR..0F PITTSBURG, PENNSYL- VANIA.

Letters Patent No. 82,725, 'dated October 6, 1868.

IMPROVEMENT IN STRAP-BOLTS.

vTO ALL WHOM IT MAY CONGERN:

Be it known that we, WILLIAM J. Lewis and III-:Nur W. OLIvnn, Jr., ofthe ci :y ot Pittsburg, in the county of Allegheny, and State ofPennsylvania, have invented a new and usefulImprovcment-n theManufacture of Iron for Strap-Bolts; and we do hereby declare that thefollowing is a full and enact description thcreof,rei`er ence being hadto the accompanying drawings, and to the letters and figures ofreference marked thereon.

The nature of our invention consists in producing a new article ofmanufacture, to wit, rolling hars of metal so 'as to constitute a seriesof blanks for strap-bolts of the form hereinafter described.

To -enableothers skilled in the art to make and use our invention, wewill proceed to describe its construction and operation.

In-the accompanying drawings, which form part of our specification-Figure 1 represents a top view of a. section of a. bar of iron, of ourimproved manufacture.

Figure 2 is a sido view of the same.

Figure 3 is a transverse section of the same, when cut through at line 1of figs. 1 and 2.

Figure 4 is a. transverse section ofthe bar, when cnt through at lines 2of figs. 1 and 2.

Figure 5 is a transverse section of the bar. when ont through at lines 3of gs. 1 and 2. q

We form the bars by means of rolls, one of which is provided with a.groove or grooves, and recesses which correspond in form and size to theform and size desired for the strapbolts. Havingone of the rolls thusprovided with a groove or grooves and recesses, we take a. round bar-ofA iron, as it comes from the ordinary rolls for forming ronnds,v andwhile it is in its heated condition, we pass it between thc rollsprovided with a groove or grooves and recesses which corresponds to theyt'orrn desired for the strap-bolts, and thereby give to the bar theform represented in figs. 1 and 2.

In constructing strap-bolts, the bars are cut in suitable lengths, whichcuttingmust depend on the judgment and desire of the'mechanc for thelength ofthe screw on Athe lower end of the strap-bolt, anddepth of thewagon-bed'must be the guide for the lengths for cutting o thc iron forthe strap-holt. The part marked A should, as a. general rule, bc cut ordivided at the line marked 1. This part is provided, in the ordinaryway, with screw-threads and screw-nut. The next point for cutting ordividing o` the bar is in part marked C. The dividing-line in this partwill depend entirely upon the depth of the 'wagon-bed, or other purposeto which it may be applied. The part marked B is made in the formrepresented, for the purpose of obtaining strength in that part of thestrap-bolt against which the greatest force or strain is brought tohear, which is always near the bottom of the wagon-bed. Experience hasdemonstrated the fact that the strap-bolt is broken o` more frequentlyin the part marked B, than in any other part of the strap-bolt. The ribe,on part B, and the general formpt' this part, as represented in theaccompanying drawings, experience has proved to he the most desirabieform for strength and neatness of finish. A

The parts marked B and C are provided with screw or rivet-holes at suchpoints as suit the taste and judgment of the mechanic.

The advantage of rolling iron out into bars of the form herein describedand represented will be very apparent to all who manufacture strap-boltsfor wagon-beds. It saves the labor and expense of forgingjas nowpractised. It makes n smooth and uniform strap-bolt, giving to the holtalways strength where it is most needed,

and'also neutness of finish: 1 l

Having thus described the nature, construction, and operation of ourimprovement, what. we claiml as of our invention, is

A new article ofhmanufuctnrc, iron rolled to constitute a series ofblanks, in bars, for strap-bolts of the form herein described.

. s WM. J. LEWIS.

' HENRY W. OLIYER, Ju.

Witnesses: l

Janus J. Jonnsron, A. CQJonnsroN.

